Adult males weigh about 7
kg and are less than 2 m long. Females
are equally long and weigh 55-60 kg.
Life expectancy is about 30 years.
The upper body is dark grey, the sides lighter, and the
underbelly white. Dark stripes between the small flippers and the mouth.
The dorsal fin is a low triangle.
Each jaw has 40-60 paddle-like teeth.
Diving time is usually 2-6 minutes and the whale dives down to
10-100 m for food. Its diet
is mainly fish, but also squid and krill.
Porpoises are found in shoals of 2-10, but sometimes 200-300 are
seen together. They seldom
leap out of the water.
The main habitats of the
porpoises are in the northern seas, the Atlantic- and Pacific Oceans.
Females reach puberty at the age of 3-4 and males later.
Usually each cow gives birth to one calf every year and the
gestation period is 10-11 months. Harbour porpoises were caught all around the country,
especially off the Breidafiord Bay and the Westfiords.
It often is tangled up in lumpfish nets and the meat is used.
It is exploited off the coasts of Washington, Canada and
Greenland. The world
population is unknown. The
harbour porpoise is probably endangered by the increasing pollution of